In 2009, the UK reconfirmed tis long-standing public policy against perpetual trusts. America has been moving in the opposite direction. Recent years have seen a movement in the states to pass legislation allowing settlors to create family trusts that can last forever or for several centuries. Sadly, and embarrassingly, the American perpetual-trust movement has not been based on the merits of removing the traditional curb on excessive dead-hand control. The policy issues associated with allowing perpetual trusts have not been seriously discussed in the state legislatures. The driving force has been interstate competition for trust business.
Waggoner, Lawrence W. "US Perpetual Trusts." L. Q. Rev. 127, no. 3 (2011): 423-31.